Let \( P(3\cos\alpha, 2\sin\alpha), \alpha \neq 0 \), be a point on the ellipse \( \frac{x^2}{9} + \frac{y^2}{4} = 1 \), Q be a point on the circle \( x^2 + y^2 - 14x - 14y + 82 = 0 \) and R be a point on the line \( x + y = 5 \) such that the centroid of the triangle PQR is \( \left( 2 + \cos\alpha, 3 + \frac{2}{3}\sin\alpha \right) \). Then the sum of the ordinates of all possible points R is:
