The volume of a cube can be calculated using the following equation:
volume = s³
In this situation, s = any side length since cubes have an equal width, height, and length.
Since we know Amanda's box has 6in edges (s=6) we can plug that into our equation:
volume = (6in)³ or (6in x 6in x 6in)
volume = 216in³
So the volume of Amanda's jewelry box is 216 inches³