The height and the radius of a cone are 21 cm and $$7\sqrt{7}$$ cm, respectively. Find the volume of the cone (Take $$\pi = \frac{22}{7}$$)

A

6,982 $$cm^{3}$$

B

7,546 $$cm^{3}$$

C

7,634 $$cm^{3}$$

D

6,724 $$cm^{3}$$