Step 1 :We are given the equation $3^{-3}=\frac{1}{27}$ and asked to convert it into logarithmic form.
Step 2 :The logarithmic form of the equation $3^{-3}=\frac{1}{27}$ is $\log_{3}\left(\frac{1}{27}\right)=-3$. This is because the logarithm base $3$ of $1/27$ is $-3$, as $3$ raised to the power of $-3$ equals $1/27$.
Step 3 :Final Answer: \(\boxed{\log_{3}\left(\frac{1}{27}\right)=-3}\)