The volume of the largest possible cube that can be inscribed in a hollow spherical ball of radius r cm is

A

$$\frac{2}{\sqrt{3}}r^{2}$$

B

$$\frac{4}{3}r^{2}$$

C

$$\frac{8}{3\sqrt{3}}r^{3}$$

D

$$\frac{1}{3\sqrt{3}}r^{3}$$