iOS performance: Mesh.DrawVBO counts

How does one reduce the number of calls to this function? Right now the project is hovering at about 60ms drawing the scene with nothing going on (it jumps to about 90 when enemies are spawned) and there are 300+ calls to Mesh.DrawVBO

How do I go about optimizing this? There are a large number of 3D objects, though the total triangle count is below 20k (based on my last estimation I've got approximately 15k triangles; the largest contributors total 12,700 or so, along with 65 or so objects with another 20 tris each).