4. If $a$ is a real root of the quadratic equation $3 x^{2}-2 x-663=0$, then $\left(3 a^{3}-64 \frac{1}{3} a-443\right)^{3}=(\quad)$.
(A) 1
(B) -1
(C) 8
(D) -8
4. B.
$$
\text { Given } \begin{aligned}
& 3 a^{3}-664 \frac{1}{3} a-443 \\
& =\left(a+\frac{2}{3}\right)\left(3 a^{2}-2 a-663\right)-1=-1 .
\end{aligned}
$$