Correlated Indicators

Let $A$ and $B$ be events with $0 < \mathbb{P}\left( A \right), \mathbb{P}\left( B \right) < 1$. Define $I_A$ and $I_B$ to be the indicator random variables of $A$ and $B$, respectively. Suppose $\corr{I_A}{I_B} = \rho$. If possible, find $\corr{I_{A^c}}{I_{B^c}}$ when $\rho = 0.3$. If not, answer $-2$.