Functions

\(\mathrm{f}: \mathrm{R} \rightarrow \mathrm{R} ; \mathrm{g}: \mathrm{R} \rightarrow \mathrm{R}\) are two functions such that \(\mathrm{f}(x)=2 x-3, \mathrm{~g}(x)=x^3+5\), then \((\mathrm{fog})^{-1}(-9)\) is