After cropping tiff its size increases almost two times

I have a tiff file 2544x3472 and its size is 402960 bytes. After that I cropped it using ImageMagick:

convert "$path" -crop 2544x1850+0x0 -compress JPEG "${PWD}"/output/$filename

and now its size is 762374 bytes. Why and how to decrease its size?

Original file info:

  Format: TIFF (Tagged Image File Format)
  Class: DirectClass
  Geometry: 2544x3472+0+0
  Resolution: 300x300
  Print size: 8.48x11.5733
  Units: PixelsPerInch
  Type: TrueColor
  Base type: TrueColor
  Endianess: MSB
  Colorspace: sRGB
  Depth: 8-bit
  Chael depth:
    red: 8-bit
    green: 8-bit
    blue: 8-bit
  Chael statistics:
    Red:
      min: 11 (0.0431373)
      max: 255 (1)
      mean: 245.305 (0.961982)
      standard deviation: 40.5159 (0.158886)
      kurtosis: 16.454
      skewness: -4.21124
    Green:
      min: 13 (0.0509804)
      max: 255 (1)
      mean: 246.888 (0.968189)
      standard deviation: 36.9046 (0.144724)
      kurtosis: 22.0061
      skewness: -4.79686
    Blue:
      min: 17 (0.0666667)
      max: 255 (1)
      mean: 248.162 (0.973183)
      standard deviation: 35.1016 (0.137653)
      kurtosis: 26.3384
      skewness: -5.26587
  Image statistics:
    Overall:
      min: 11 (0.0431373)
      max: 255 (1)
      mean: 246.785 (0.967785)
      standard deviation: 37.5749 (0.147352)
      kurtosis: 21.027
      skewness: -4.71691
  Rendering intent: Perceptual
  Gamma: 0.454545
  Chromaticity:
    red primary: (0.64,0.33)
    green primary: (0.3,0.6)
    blue primary: (0.15,0.06)
    white point: (0.3127,0.329)
  Interlace: None
  Background color: white
  Border color: srgb(223,223,223)
  Matte color: grey74
  Transparent color: black
  Compose: Over
  Page geometry: 2544x3472+0+0
  Dispose: Undefined
  Iterations: 0
  Compression: JPEG
  Orientation: TopLeft
  Properties:
    date:create: 2016-04-21T07:33:25+03:00
    date:modify: 2016-04-20T14:54:59+03:00
    jpeg:sampling-factor: 2x2
    signature: 78c318002a84787caf29b0e49e527d5cc740ce37f95dd60d901f31c0126aef25
    tiff:endian: lsb
    tiff:photometric: YCBCR
    tiff:rows-per-strip: 16
    tiff:software: xsane
    tiff:timestamp: 2016:04:20 14:54:59
  Artifacts:
    filename: page0001.tiff
    verbose: true
  Tainted: False
  Filesize: 403KB
  Number pixels: 8.833M
  Pixels per second: 73.61MB
  User time: 0.130u
  Elapsed time: 0:01.120
  Version: ImageMagick 6.7.7-10 2014-03-06 Q16 http://www.imagemagick.org

Final file info:

  Format: TIFF (Tagged Image File Format)
  Class: DirectClass
  Geometry: 2544x1850+0+0
  Resolution: 300x300
  Print size: 8.48x6.16667
  Units: PixelsPerInch
  Type: TrueColor
  Base type: TrueColor
  Endianess: MSB
  Colorspace: sRGB
  Depth: 8-bit
  Chael depth:
    red: 8-bit
    green: 8-bit
    blue: 8-bit
  Chael statistics:
    Red:
      min: 5 (0.0196078)
      max: 255 (1)
      mean: 236.75 (0.928432)
      standard deviation: 54.1507 (0.212356)
      kurtosis: 6.55873
      skewness: -2.85258
    Green:
      min: 12 (0.0470588)
      max: 255 (1)
      mean: 239.712 (0.940049)
      standard deviation: 49.538 (0.194267)
      kurtosis: 9.47418
      skewness: -3.30128
    Blue:
      min: 10 (0.0392157)
      max: 255 (1)
      mean: 242.064 (0.949272)
      standard deviation: 47.2908 (0.185454)
      kurtosis: 11.7772
      skewness: -3.66424
  Image statistics:
    Overall:
      min: 5 (0.0196078)
      max: 255 (1)
      mean: 239.509 (0.939251)
      standard deviation: 50.4075 (0.197676)
      kurtosis: 8.98602
      skewness: -3.24651
  Rendering intent: Perceptual
  Gamma: 0.454545
  Chromaticity:
    red primary: (0.64,0.33)
    green primary: (0.3,0.6)
    blue primary: (0.15,0.06)
    white point: (0.3127,0.329)
  Interlace: None
  Background color: white
  Border color: srgb(223,223,223)
  Matte color: grey74
  Transparent color: black
  Compose: Over
  Page geometry: 2544x1850+0+0
  Dispose: Undefined
  Iterations: 0
  Compression: JPEG
  Orientation: TopLeft
  Properties:
    date:create: 2016-04-21T09:49:12+03:00
    date:modify: 2016-04-21T09:49:12+03:00
    jpeg:sampling-factor: 2x2
    signature: 713fe32fdb33161257f6836e2cc6c6a929be9003ac9c29f6fd12b5995850c084
    tiff:document: /home/KastoyyPE/Desktop/Математика 5 temp/output/page0001.tiff
    tiff:endian: lsb
    tiff:photometric: RGB
    tiff:rows-per-strip: 16
    tiff:software: xsane
    tiff:timestamp: 2016:04:20 14:54:59
  Artifacts:
    filename: page0001.tiff
    verbose: true
  Tainted: False
  Filesize: 762KB
  Number pixels: 4.706M
  Pixels per second: 52.29MB
  User time: 0.090u
  Elapsed time: 0:01.089
  Version: ImageMagick 6.7.7-10 2014-03-06 Q16 http://www.imagemagick.org