Volume formula= L•W•H
Cube, length= 12in (cubes are the same length on each side)
So 12•12•12
= 1,728in for just 1 cube
Volume of 1 cube=1,728in(cubed)
Im assuming that a bigger cube would be 4 cubes together or 8 cubes.
So for 4 cubes together it would be 1,728•4 = 6,912in(cubed)
For 8 cubes together it would be
1,728•8= 13,824in(cubed)