To apply the property of negative integer exponents, we use the rule:
\[ a^{-n} = \frac{1}{a^n} \]
In this case, for \(3^{-4}\), we can rewrite it as:
\[ 3^{-4} = \frac{1}{3^4} \]
Next, we calculate \(3^4\):
\[ 3^4 = 3 \times 3 \times 3 \times 3 = 81 \]
Thus, we have:
\[ 3^{-4} = \frac{1}{3^4} = \frac{1}{81} \]
So, the final answer is:
\[ \frac{1}{81} \]