A solid metallic sphere of radius 4 cm is melted and recast into '4' identical cubes. What is the side of the cube?

A

$$7 \sqrt[3]{\frac{\pi}{3}}cm$$

B

$$5 \sqrt[3]{\frac{\pi}{3}}cm$$

C

$$6 \sqrt[3]{\frac{\pi}{3}}cm$$

D

$$4 \sqrt[3]{\frac{\pi}{3}}cm$$