Momentum on Pendulum

A bullet with mass 10gr is shot in a ballistic pendulum with mass 1.49kg until the pendulum move up and reach $\theta$ degree ( $\cos \theta = 0.75$ ). If the length of the pendulum string is 0.4m, hence, what is the initial velocity of the bullet ? ( take $g = 9.8\frac{m}{s^{2}}$ )