Advantageous Opportunity

At my job, I’ve hit a bit of a wall financially and responsibility-wise. I’ve asked my manager for an increase in salary based on performance — of my salary grade range, I am making the minimum, even after four years. HR has said no twice. I am also looking to increase my workload/responsibilities as I am looking to grow. I don’t feel as though I’m growing anymore.

My manager was our department administrator, and she has been promoted to vice president of our department. Her role has been more strategic it seems, but she still acts tactically. I want to handle the tactical matters.

How do I pitch this idea? How do I make it seem advantageous for both the department and me? How would you go about this? My current position is executive coordinator.

Let me know if you need more context/details.