Where do I report a scam text like this?

It's estimated that somewhere in the range of 70-300 billion emails are sent world wide, every day. It's also estimated that approximately 25-50% of those emails are spam. Of those, one estimate claims that 2.5% of spam emails are scams.

It's extremely unlikely that anyone will care enough, or have the bandwidth to investigate the single scam email you received among the other approximately 1 billion scam emails that were also sent that day. I'd recommend deleting it and moving on.

That being said, some countries have ways to report these types of scams. For example, the US FBI has an address where you can send messages for this specific type of scam. Australia's information can be found here. If it were me though I wouldn't waste my time.