Pinnacle airline Flight question in MDW

I often fly from MDW to DTW. I just noticed that NW/DL has assigned a new flight to the 4:10 departure flight 3766. This is a CRJ200.I havn’t flown yet this month and was wondering where the inbound flight to MDW originates so I can track it?

NW only flies to MDW from DTW and MSP. I believe MSP is all Mainline and E-Jets so the aircraft is likely coming from DTW.