Answer:
1000000000 ml^3 or 1000000L^3
Explanation:
First you have to know that the volume of a cube is found by A^3
A is 1 side of the cube.
Now plug in the number 1000.
1000^3=1000000000 ml^3
To simplify you could turn it into liters. To do this divide by 1000.
This would result in 1000000L^3