If $$\left(X-\frac{1}{x}\right)=\frac{7}{3}$$, what is the value of $$\left(X^{3}-\frac{1}{x^{3}}\right)=?$$

A

$$19\frac{20}{27}$$

B

$$19\frac{19}{27}$$

C

$$19\frac{7}{9}$$

D

$$19\frac{2}{3}$$