cuDNN for CUDA 3.0 not found

I have a GEforce GT 755M. My Cuda capability is 3.0 and i found out on stack overflow that upto cuDNN 5.1 is compatible with CUDA 3.0. But i can not find a download link (even in the archives links it has cuDNN 5.1 for CUDA 6>).
And be compatible with Ubuntu 16.04