What is ${\left( 8^{3} \right)^{-3}}$

${\frac{1}{512}^{ 0 }}$ ${8^{ -9 }}$ ${\frac{1}{512}^{ -9 }}$ ${8^{ 0 }}$ ${8^{ \frac{1}{27} }}$ ${\frac{1}{512}^{ \frac{1}{27} }}$