Roots of an Interesting Polynomial

Algebra Level 4

Suppose the roots of $x^3 + 3x^2 + 4x - 11$ are $\alpha, \beta, \gamma$ .

If the roots of $x^3 + rx^2 + sx + t$ are $\alpha + \beta, \alpha + \gamma, \beta + \gamma$ , then find $t$ .