You can't convert volume to weight without more information. 1400 CC of vacuum weighs nothing.
1,000,000 cubic centimeters
39,643.59 liters per 1400 cubic feet.
28,316.85 cubic centimeters.
2,359.7 cubic centimeters.
22,653,477.3 cubic centimeters.
1688 cubic centimeters
1728 cubic inches = 28316.8 cubic centimeters
15
1 cubic centimeters = 0.061024 cubic inch
1 inch = 2.54 centimeters 1 cubic inch = (2.54)3 cubic centimeters = 16.387064 cubic centimeters
0.00317 cubic meters = 1000000 x 0.00317 cubic centimeters = 3170 cubic centimeters
236.588236 cubic centimeters